What is an important feature of a smoke detector?

A smoke detector is designed primarily to alert occupants to the presence of smoke, which is often an early indicator of fire. By detecting smoke, it provides a crucial warning that allows individuals to evacuate the area or take necessary actions to address the situation. This early detection can significantly increase the chances of safety and reduce the risk of injury or loss of life in case of a fire emergency.

In contrast, other options do not accurately reflect the primary function of a smoke detector. While firefighters benefit from visual alarms, this is not a primary feature of smoke detectors, which focus on alerting those within the facility. Additionally, smoke detectors do not regulate temperature or monitor air quality; those functions are typically handled by other systems.